Brush-holder.



No. 717,656. PATENTED JAN. 6, 1903. W. W. BEBLER. BRUSH HOLDER.

APPLIGATION FILED APR. 26, 1902.

N0 MODEL.

'fizesses: 1%0672202 3 I puma/M4 Ska. M4 67 Unites STATES ATENT FFICE.

\VALTER WV. BEELER, OF BALTIMORE, MARYLAND.

BRUSH-HOLDER.

SPECIFICATION forming part of Letters Patent No. 717,656, dated January 6, 1903.

Application filed April 26,1902.' Serial No. 104,815. (No model.)

To ctZZ whom it may concern:

Be it known that I, WALTER W. BEELER, of Baltimore city, State of Maryland, have invented a certain new and useful Brush-Holder, of which the following is 'a specification.

My present invention relates to brush-,

holders for holding carbon brushes or brushes made of any othermaterial used to collect electric currents from the commutator-cylinder of a dynamo and for delivering such currents to the commutators of motors,and has reference more particularly to improvements whereby as many brush-holders as may be needed can be used, and each brush-holder, if more than two are used, can be easily and readily replaced without interfering with the operation of the commutator, at the same time securing cheapness of manufacture.

The invention is also designed to overcome the destruction of the tension-spring by electric currents by placing the tension-spring beyond the pin of the yoke of the commutator.

In the accompanying drawings, Figure 1 shows a side elevation of the brush-holder containing a brush complete as applied to a commutator-cylinder. Fig. 2 shows inside elevation of the brush-holder with one side off, showing the connection of the parts and with the brush out. Fig. 3showsa back view of the curved portion of the bruslrholder, showing the spring, tension screw or pin, thumb-screw, and guide. Fig. 4 shows in perspective the top of the curved end of the brush-holder with the projections c 0 thereon, together with the thumb-screw with the slots 0 0 cut therein and the tension screw or pin with guide.

A, Fig. 1, indicates the commutator-cylinder, made up, as usual, ofa series of conducting plates or segments insulated from one another, and D indicates the commutator-brush, which is held in a hole provided therefor in the end of the brush-holder O.

13 indicates the hole through which the pin of the yoke of the commutator passes and to which the brush-holder is made tight and held in any position desired by an ordinary screw Y, as indicated in Fig. 2.

O is the frame of the brush-holder and is made, preferably, of brass, and it has a hole cut in the end, as indicated by R in Fig. 2,

said spring being connected with a pin or rod L. Near one end of this pin or rod L is afiat head P, that projects beyond and behind the edges of G, which acts as a guide and keeps the spring in place and line, as indicated in Fig. 4. At the other end of this pin or rodL is screwed the thumb-screw 0. Under the bottom of the thumb -screw 0 are cut the grooves 0 0, which are made to fit upon the projections c c, as indicated in Fig. 4, so that when it is screwed down as tight as needed these grooves o 0 and projections c 0 look and prevent the thumb-screw from working loose.

The regulation of the pressure of the brush D upon the commutator A is controlled by the spring G.

The tightening of the thumb-screw O forces the end of the lever H, with the movable piece E, down upon the brush D and keeps it always in contactwith the commutator A. The grooves in the thumb-screw O and the projections in O, as illustrated in Fig.4, keep the said screw tight and prevent the tension on the brush from increasing or decreasing by the jarring of the machine incident to its operation. The spring being located beyond the place where the brush-holder is attached to the pin on the yoke of the commutator, the electric current passes from the commutator into the brush-holder and is carried away by said pin on the yoke of the commutator without coming in contact with the spring. Thus the tension of the spring is not destroyed or afiected by the electric current.

What I claim as my invention is 1. A commutator-brush holder the back portion of which is bent, a rod with guide, a bent lover, a screw for tightening and holding the brush-holder in whatever angle desired to the pin of the yoke of the commutator, a spiral spring, means for adjusting the tension of said spring, a movable piece pivoted to the end of the bentlever, there being a hole cut in the end of the brush-holder in I to the pin on the yoke of the commutator, which fits the brush substantially as set forth. there being a hole in the end of the brush- :0 2. A commutator-brush holder consisting holder in which the brush fits substantially of a bent lever, a movable piece pivoted to as set forth 5 the end of said lever, a rod with guide, a WALTER W. BEELER.

spiral spring, means for adjusting the ten- Witnesses: sion of said spring, a screw to tighten and JACOB R. EADER, hold the brush-holder in any position desired ANDREW J. ORUTOHFIELD. 

